多指标区间决策的理想点贴近法

研究了指标的权重不能完全确定但知道其所在区域的条件下的多指标决策问题 ,给出了方案与理想解的贴近度及其算法 ,按贴近度的大小可以对方案进行排序 .它同传统的决策方法相比较 ,具有需要信息量少 ,简单可靠等特点 .最后用该决策方法分析了一个实际问题 .     

A Characterization of the Optimal p-sum Labellingsof Unit Interval Graphs

1.IntroductionGraphsconsideredinthispaperarefiniteandsimple.FOragraphG,V(G)andE(G)denoteitssetofvenicesandedges,respectively.AbijectionwillbecalledalabellingofG.Letpbeapositiverealnumber.ForagivenlabellingTofagraphG,definethegndiscrepencya.(G,ac)ofTasTheobjectiveoftheminimum-p--sumproblemistofindalabelling7ofagraphGsuchthatac(G,T)isassmallaspossible.ThelabellingTminimizinga.(G,7)iscalledanoptimalHsumlabellingofG.Theminimumvalueiscalledtheminimum-psumofG.ItisshowninI31thattheminimum-…     

An Interval-Parameter Fuzzy Approach for Multiobjective Linear Programming Under Uncertainty

An interval-parameter fuzzy linear programming method (IFMOLP) is proposed in this study for multiple objective decision-making under uncertainty. As a hybrid of interval-parameter and fuzzy methodologies, the IFMOLP incorporates interval-parameter linear programming and fuzzy multiobjective programming approaches to form an integrated optimization system. The method inherits advantages of interval-parameter programming, and allows uncertainties and decision-makers’ aspirations to be effectively communicated into its programming processes and resulting solutions. Membership functions for both objectives and constraints are formulated to reflect uncertainties in different system components and their interrelationships. An interactive solution procedure has been developed based on solution approaches of the interval-parameter and fuzzy programming techniques, plus necessary measures for handling the multiobjective feature. A didactic example is provided in the paper to illustrate the detailed solution process. Possibilities of further improvements by seeking Pareto optimum and incorporating flexible preference within constraints are also discussed.     

指数分布卷积形式参数的估计

本文研究指数分布卷积形式参数的点估计，区间估计以及经验分布函数与分布函数最大偏差的概率估计．     

对完善我国工伤保险制度的思考

完善我国工伤保险制度的根本措施就是扩大工伤保险的范围、拓宽工伤保险基金的来源渠道，把工伤补偿与工伤预防、医疗康复、职业康复紧密地结合起来，不断提高工伤保险的管理水平。     

Interval parameter perturbation method for evaluating the bounds on natural frequencies of structures with interval parameters

For structural parameters with uncertainties, interval mathematics can, in the case where the probabilistic distribution density of uncertain variables is unavailable, deal with the influence of uncertainties in structural parameters on the response of structures. In order to evaluate the region containing natural frequencies of structures with interval parameters, the interval parameter perturbation method is presented in this paper. The advantage of the present method is its computational efficiency in evaluating the region containing natural frequencies. A numerical example is used to illustrate the efficiency of the method proposed. The project is supported by National Youth Natural Science Foundation of China and National Outstanding Youth Science Foundation of China.     

Peak recognition technique by a computer program copying the human judgement

Summary It is still difficult to determine peaks and peak boundaries properly, though peak recognition is very important for the precision of quantitative data. A new computer program overcomes these problems using a method which is adapted from human judgements. The algorithm was developed for HPLC but can also be used in other fields of analytical chemistry.     

Interval estimation of the critical value in a general linear model

Summary This paper concerns interval estimation of the critical value θ which satisfies under the general linear model,Y _i =μ(x _i )+ε _i (i=1,2,···), where for and the functional forms off _j ^′ s are known. From an asymptotic expansion it is shown that, under reasonable conditions, the limiting distribution of is normal. Thus in the large-sample case a confidence interval for θ can be obtained. Such a result is useful when one is interested in carrying out a retrospective analysis rather than designing the experiment (as in the Kiefer-Wolfowitz procedure). In Section 3 a sequential procedure is considered for confidence intervals with fixed width 2d. It is shown that, for a given stopping variableN, is also asymptotically normal asd→0. Thus the coverage probability converges to 1−α (preassigned) asd→0. An example of application in estimating the phase parameter in circadian rhythms is given for the purpose of illustration. Research partially supported by the NSF Grant DMS-8502346.     

预应力混凝土箱梁爆炸损伤评估及公式拟合

对预应力混凝土箱梁进行爆炸损伤评估研究。首先,对矩形梁进行爆炸数值分析,结合现场试验结果验证了爆炸数值模型的准确性、可靠性。其次,基于箱梁剩余承载力,建立了箱梁爆后损伤评估准则。通过对预应力混凝土箱梁在不同爆炸工况下的爆后剩余承载力计算,建立箱梁各损伤程度下P?I（超压?冲量）曲线。研究发现,混凝土强度对箱梁超压和冲量临界值影响较大,钢筋屈服强度对超压和冲量临界值影响较小。随着结构损伤等级的增大,各参数对箱梁P?I曲线的影响幅度各不相同。最后,对不同混凝土强度箱梁中各损伤等级P?I曲线进行公式拟合,并对拟合参数β进行分析。     

基于降维观测器与多胞体方法的执行器故障检测

针对具有执行器故障且状态方程和输出方程同时受到外部扰动影响的离散系统,研究了降维观测器设计方法和基于多胞体理论的区间估计方法,并在此基础上提出了基于区间估计的执行器故障检测方法。首先,通过适当的状态等价变换,将原系统分解成2个降维子系统,使得一个子系统可以直接解耦干扰。然后,在无执行器故障发生的前提下,基于对干扰解耦的子系统,提出了一种降维观测器设计方法,实现了原系统状态的渐近收敛估计。其次,针对具有干扰的子系统,设计了Luenberger型观测器,并结合多胞体理论,提出了一种对可测输出的区间估计方法。之后,基于可测输出的区间估计,提出了一种残差的构造方法,以此提出了一种执行器故障检测新方法。最后,给出了仿真设计和分析,验证了方法的有效性。